Email marketing requires a suite of tools to create, send, and analyze campaigns. An Email Service Provider (ESP) is crucial for managing your email lists, automating campaigns, and tracking performance metrics. Popular ESPs include Mailchimp, Constant Contact, and SendinBlue. Additionally, Customer Relationship Management (CRM) software helps to segment your audience and personalize your emails, while analytics tools like Google Analytics can measure the impact of your campaigns on your website traffic and conversions.